Number of 2*n X n 0..1 arrays with row sums 3 and column sums 6.

A172553

Number of 2*n X n 0..1 arrays with row sums 3 and column sums 6.

Terms

    a(0) =0a(1) =0a(2) =1a(3) =2520a(4) =56586600

External references